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SOB fix

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folkert van heusden 2022-03-19 18:37:25 +01:00
parent 0d16d16ab8
commit c225b01d71
1 changed files with 8 additions and 2 deletions
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10
cpu.cpp
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@ -529,12 +529,18 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
} }
case 7: { // SOB case 7: { // SOB
uint16_t oldPC = getPC(); // FIXME gaat dit wel goed voor R7? uint16_t oldPC = getPC();
addRegister(reg, false, -1);
if (reg == 7)
addRegister(reg, false, -2);
else
addRegister(reg, false, -1);
if (getRegister(reg, false)) { if (getRegister(reg, false)) {
uint16_t newPC = oldPC - dst * 2; uint16_t newPC = oldPC - dst * 2;
setPC(newPC); setPC(newPC);
} }
return true; return true;
} }
} }